EP3870827A1 - Turbomachine à double hélices non carénées - Google Patents
Turbomachine à double hélices non carénéesInfo
- Publication number
- EP3870827A1 EP3870827A1 EP19813119.5A EP19813119A EP3870827A1 EP 3870827 A1 EP3870827 A1 EP 3870827A1 EP 19813119 A EP19813119 A EP 19813119A EP 3870827 A1 EP3870827 A1 EP 3870827A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- propeller
- turbomachine
- generator
- operating mode
- rotation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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- 230000007257 malfunction Effects 0.000 claims description 9
- 238000004146 energy storage Methods 0.000 claims description 7
- 239000003380 propellant Substances 0.000 claims description 7
- 239000003638 chemical reducing agent Substances 0.000 claims description 5
- 230000001276 controlling effect Effects 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 230000002950 deficient Effects 0.000 claims description 4
- 230000007935 neutral effect Effects 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 37
- 238000011144 upstream manufacturing Methods 0.000 description 6
- 230000009467 reduction Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
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- 230000001627 detrimental effect Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 210000003462 vein Anatomy 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D27/00—Arrangement or mounting of power plants in aircraft; Aircraft characterised by the type or position of power plants
- B64D27/02—Aircraft characterised by the type or position of power plants
- B64D27/10—Aircraft characterised by the type or position of power plants of gas-turbine type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K3/00—Plants including a gas turbine driving a compressor or a ducted fan
- F02K3/02—Plants including a gas turbine driving a compressor or a ducted fan in which part of the working fluid by-passes the turbine and combustion chamber
- F02K3/04—Plants including a gas turbine driving a compressor or a ducted fan in which part of the working fluid by-passes the turbine and combustion chamber the plant including ducted fans, i.e. fans with high volume, low pressure outputs, for augmenting the jet thrust, e.g. of double-flow type
- F02K3/072—Plants including a gas turbine driving a compressor or a ducted fan in which part of the working fluid by-passes the turbine and combustion chamber the plant including ducted fans, i.e. fans with high volume, low pressure outputs, for augmenting the jet thrust, e.g. of double-flow type with counter-rotating, e.g. fan rotors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/10—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines
- B60L50/13—Electric propulsion with power supplied within the vehicle using propulsion power supplied by engine-driven generators, e.g. generators driven by combustion engines using AC generators and AC motors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
- B64C11/30—Blade pitch-changing mechanisms
- B64C11/306—Blade pitch-changing mechanisms specially adapted for contrarotating propellers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
- B64C11/46—Arrangements of, or constructional features peculiar to, multiple propellers
- B64C11/48—Units of two or more coaxial propellers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D27/00—Arrangement or mounting of power plants in aircraft; Aircraft characterised by the type or position of power plants
- B64D27/02—Aircraft characterised by the type or position of power plants
- B64D27/026—Aircraft characterised by the type or position of power plants comprising different types of power plants, e.g. combination of a piston engine and a gas-turbine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D27/00—Arrangement or mounting of power plants in aircraft; Aircraft characterised by the type or position of power plants
- B64D27/02—Aircraft characterised by the type or position of power plants
- B64D27/24—Aircraft characterised by the type or position of power plants using steam or spring force
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
- F02B61/04—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
- F02C3/04—Gas-turbine plants characterised by the use of combustion products as the working fluid having a turbine driving a compressor
- F02C3/06—Gas-turbine plants characterised by the use of combustion products as the working fluid having a turbine driving a compressor the compressor comprising only axial stages
- F02C3/067—Gas-turbine plants characterised by the use of combustion products as the working fluid having a turbine driving a compressor the compressor comprising only axial stages having counter-rotating rotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/36—Power transmission arrangements between the different shafts of the gas turbine plant, or between the gas-turbine plant and the power user
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K3/00—Plants including a gas turbine driving a compressor or a ducted fan
- F02K3/02—Plants including a gas turbine driving a compressor or a ducted fan in which part of the working fluid by-passes the turbine and combustion chamber
- F02K3/04—Plants including a gas turbine driving a compressor or a ducted fan in which part of the working fluid by-passes the turbine and combustion chamber the plant including ducted fans, i.e. fans with high volume, low pressure outputs, for augmenting the jet thrust, e.g. of double-flow type
- F02K3/062—Plants including a gas turbine driving a compressor or a ducted fan in which part of the working fluid by-passes the turbine and combustion chamber the plant including ducted fans, i.e. fans with high volume, low pressure outputs, for augmenting the jet thrust, e.g. of double-flow type with aft fan
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D27/00—Arrangement or mounting of power plants in aircraft; Aircraft characterised by the type or position of power plants
- B64D2027/005—Aircraft with an unducted turbofan comprising contra-rotating rotors, e.g. contra-rotating open rotors [CROR]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/30—Application in turbines
- F05D2220/32—Application in turbines in gas turbines
- F05D2220/324—Application in turbines in gas turbines to drive unshrouded, low solidity propeller
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/30—Application in turbines
- F05D2220/32—Application in turbines in gas turbines
- F05D2220/325—Application in turbines in gas turbines to drive unshrouded, high solidity propeller
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/70—Application in combination with
- F05D2220/76—Application in combination with an electrical generator
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
Definitions
- Turbomachinery of the non-ttled type are part of the context of having architectures aimed at maximizing energy efficiency, while exhibiting an ability to integrate (geometrically and aerodynamically) correctly with the aircraft.
- a first solution is a turbomachine with a pair of counter-rotating propellers (in English, "counter rotating open rotor” (CROR)) as described for example in document FR 2 941 492.
- a turbomachine comprises an air inlet and a vein circulation of a flow delimited by an external casing and an internal hub.
- the vein passes through a gas generator, here with a double body which feeds a turbine driving two counter-rotating propellers.
- these two counter-rotating propellers are integral in rotation with a gas generator turbine.
- the turbomachine of this document has the particular advantage of combining an excellent propulsive efficiency linked to a generation of thrust via propellers with very low pressure ratio, and of external dimensions smaller than those of a turbomachine with single propeller of same thrust, facilitating its physical integration on the aircraft.
- This architecture based on a pair of counter-rotating propellers, however, has a certain number of limitations, in particular due to the complexity of the subsystems necessary for its implementation (double pitch setting system for the propellers, rotating casings under each propeller rotor , ).
- a turbomachine of an aircraft comprising an external casing delimiting with an internal hub, a flow stream of a gas flow in which is arranged a low pressure turbine configured for rotating a low pressure shaft; said turbomachine comprising, in the direction of flow of the gas flow, a first propeller; and a second propeller downstream of the first propeller, the first propeller being rotated by said low pressure shaft and the second propeller being rotated by an electric motor, the second propeller being further disposed at a distance between 1, 5 and 4 lengths of strings from the first propeller defined between the respective timing axes of each of the first and second propellers.
- the second propeller has a length of rope between 0.8 and 1.2 times the length of the rope of the first propeller.
- the propulsion system comprises or is connected to an energy storage unit connected to the first and / or second electric motor / generator, the energy storage unit preferably having a capacity of between 200 and 500 kWh.
- the first and second propellers are arranged in front of the inlet of the gas flow circulation stream.
- the turbomachine comprises a gas generator, a control unit of the second engine / electric generator, a control unit of the stall angle of the second propeller, said control units being configured to control the second engine and the angle of timing of the second propeller according to one of the following operating modes:
- a fourth operating mode according to which the setting angle of the first propeller 31 is positioned at a negative angle and according to which the second propeller is controlled in neutral setting, the gas generator operating in a high pressure operating range between 90 % and 100%, fourth mode according to which the first propeller is in reverse thrust and the second propeller allows an inversion of the air flow supplying the first propeller;
- the pitch angle of the second propeller can be controlled so as to obtain an angle of incidence of the blades less than 0 °, in order to rotate the second propeller, in an opposite direction of rotation in the direction of rotation of the first propeller. It is also possible to control the second propeller so as to obtain an angle of incidence of the blades greater than 0 °, in order to drive the second propeller in rotation, in a direction of rotation identical to the direction of rotation of the first propeller.
- Figure 1 illustrates, schematically, a turbomachine according to a first configuration according to the invention
- FIG. 2 illustrates, schematically, an alternative to the turbomachine according to the first configuration
- FIG. 3 illustrates, diagrammatically, a turbomachine according to a second configuration in accordance with the invention
- FIG. 4 illustrates the arrangement of the propellers of the turbomachine
- FIG. 5 illustrates modes of operation of the turbomachine according to the invention
- FIG. 6 illustrates, schematically, a first mode of operation of the turbomachine according to the invention, corresponding to takeoff of the aircraft;
- FIG. 9 illustrates, schematically, the arrow of a propeller of the turbomachine according to the invention.
- FIG. 10 illustrates, schematically, the leading edge of a propeller of the turbomachine according to the invention
- - Figure 11 illustrates, schematically, a third mode of operation of the turbomachine according to the invention, according to a second embodiment, corresponding to an idle, descent of the aircraft;
- a turbomachine of an aircraft comprises an annular space 1 for the flow of a gas flow, delimited by an external casing 2 and an internal hub 3.
- annular space 1 is called, hereinafter, a stream of gas flow.
- the flow stream 1 of the gas flow can comprise from upstream to downstream, in the direction of flow of the gas flow (along the axis AA ′ and represented by arrow F), a low pressure compressor 1 1, a high pressure compressor 12, a combustion chamber 13, a high pressure turbine 14 and a low pressure turbine 15.
- the low pressure turbine 15 is configured to rotate a low pressure shaft 25 while the high pressure turbine 14 is configured to rotate a high pressure shaft 24.
- the turbomachine comprises, in the direction of flow of the gases, a first propeller 31 and a second propeller 32 downstream of the first propeller 31.
- the first and second propellers are not faired (type architecture, according to the English terminology "open rotor ”).
- the first and second propellers 31, 32 extend from the internal hub 3 and include several blades extending from this internal hub 3.
- the first and second propellers 31, 32 are arranged in front of the inlet of the stream 1 for circulation of the gas flow.
- the first and second propellers 31, 32 are arranged at the outlet of the flow stream of the gas flow.
- the first and second propellers 31, 32 are arranged downstream and externally behind and above the stream 1 for circulation of the gas flow.
- SUBSTITUTE SHEET (RULE 26> The two configurations differ from each other by the position of the first and second propeller relative to the inlet and outlet of the stream 1 for the flow of gas (the inlet and the sort being defined in the direction gas flow).
- the second propeller 32 is disposed at a distance between 1, 5 and 4 lengths of rope from the first propeller defined between respective chock axes of each of the first and second propellers 31, 32 as described below in relation to FIG. 4.
- FIG. 4 illustrates the arrangement of the first 31 and second 32 propellers along the longitudinal axis AA ’of the turbomachine.
- the spacing between the two propellers 31, 32 is taken between the timing axes A31, A32 respective of each of the propellers 31, 32.
- the propellers are spaced three lengths of LC strings.
- a distance between the two propellers small enough to minimize the spread of the speed profiles at the output of the first propeller (upstream propeller) and encourage their immediate re-use by deflecting the second propeller (downstream propeller).
- this spacing takes into account the need to integrate the pitch change mechanisms of each propeller, mechanisms requiring a certain axial volume.
- the second propeller 32 advantageously has the following geometric characteristics:
- An external diameter between 0.8 and 1 times the external diameter of the first propeller 31 upstream;
- a hub ratio (internal radius / external radius of the blade ratio) of between 0.22 and 0.40;
- the first propeller 31 is rotated by the low pressure turbine 15, by means of the low pressure shaft 25 and a first reducer 50 only, or else by the combination of a first motor / electric generator 60 and the low pressure turbine 15, and this by means of the same first reducer 50.
- the first motor / generator 60 makes it possible to compensate occasionally for the deficiencies of the low / pressure shaft 25.
- the motor / generator 60 provides part of the energy supply expected for the first propeller 31.
- the second propeller 32 is itself only driven in rotation by a second electric motor / generator 70 by means of a second reducer 80.
- the first reduction gear 50 and the second reduction gear 80 are advantageously: mechanical (of the epicyclic or planetary type) having a reduction ratio in rotation regime preferably between 8 and 12; or - electromagnetic.
- the turbomachine can comprise a first electric motor / generator 60 and a second electric motor / generator 70 which can operate as an "engine” but also as an “electric generator”.
- the propulsion system therefore includes an energy storage unit 90 connected to the first and / or second electric motor / generator, the energy storage unit preferably having a capacity of between 200 and 500 kWh .
- the storage unit 90 is a power source for the electric motor / generator 60, 70 while when the propellers 31, 32 are not driven by the motor / electric generator 60, 70, the electric motor / generator allows the storage unit 90 to be recharged.
- the electric motor / generator 60, 70 can make use of the operating modes during which it is not used as an "engine” to recharge the storage unit 90.
- the turbomachine can comprise, associated with each propeller, a control unit for the propeller setting angle (units UC1 and UC'1 in the figures) which is characterized by
- a clearance preferably between -30 ° and + 90 °;
- a clearance preferably limited to the positive pitch angles, typically 0 ° to + 90 ° / maximum 0 ° to +1 10 °.
- propeller pitch refers to the timing of each blade of the propeller.
- the second propeller 32 is advantageously used in different ways according to several operating modes of the propulsion system of the aircraft. As will be described (in relation to FIG. 5), the second propeller 32 can have several functions to contribute to the operation of the aircraft according to these different configurations.
- the turbomachine comprises a unit UC2 for controlling the second motor / generator associated with the second propeller 32, the unit UC2 for controlling the second motor / generator 70 making it possible to continuously control the supply of electric power for this second motor / generator between the extreme cases of a zero supply and a supply corresponding to the maximum second design power of the engine / generator 70.
- a first operating mode M1 corresponds to takeoff / climb of the aircraft, mode during which the turbomachine needs a high propulsive power called given propulsive power:
- the second motor / generator 70 is in "motor” mode and uses the energy of the storage unit 90 as power supply in order to drive the second propeller 32 in rotation;
- the stall angle of the second propeller is adjusted so that the second propeller 32 provides thrust, up to approximately 20 to 40% of the given propulsive power (i.e. ⁇ 5 MW maximum for a short / medium aircraft class -courrier), and so that the angle of incidence of the blades Ai is greater than 0 ° (as illustrated in FIG. 6);
- the gas generator operates in a high pressure reduced speed range (N2K) of between 90 and 100% depending on the flow of fuel injected into the combustion chamber.
- the rotation of the second propeller 32 makes it possible to reduce the level of energy required on the first propeller 31 to ensure the expected overall thrust of the propulsive system, which makes it possible to size the diameter of the first propeller 31 to a lower value than what the state of the art would require in the absence of assistance in supplying thrust via the propeller 32.
- Such a reduction in diameter makes it possible to have a first propeller 31 which is easily integrated while maintaining a high energy efficiency of the overall propulsion system.
- the energy level required on the low pressure shaft is reduced, as is that expected from the gas generator, which has the consequence of dimensioning the annular gas flow space to a lower value adapted to this reduced level of energy expected.
- a benefit on the mass of the turbomachine is obtained with improved performance as well as a reduction in noise pollution due to the ejection of gases at the outlet of the gas generator.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1859925A FR3087849B1 (fr) | 2018-10-26 | 2018-10-26 | Turbomachine a double helices non carenees |
PCT/FR2019/052557 WO2020084271A1 (fr) | 2018-10-26 | 2019-10-25 | Turbomachine à double hélices non carénées |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3870827A1 true EP3870827A1 (fr) | 2021-09-01 |
Family
ID=65444107
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19813119.5A Pending EP3870827A1 (fr) | 2018-10-26 | 2019-10-25 | Turbomachine à double hélices non carénées |
Country Status (6)
Country | Link |
---|---|
US (1) | US11987369B2 (fr) |
EP (1) | EP3870827A1 (fr) |
CN (1) | CN112930436A (fr) |
CA (1) | CA3117485A1 (fr) |
FR (1) | FR3087849B1 (fr) |
WO (1) | WO2020084271A1 (fr) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111706432B (zh) * | 2020-05-28 | 2022-03-25 | 中国航发湖南动力机械研究所 | 桨扇发动机及具有其的推进装置 |
US20220204171A1 (en) * | 2020-12-28 | 2022-06-30 | Hamilton Sundstrand Corporation | Hybrid propulsion systems |
EP4074955A1 (fr) * | 2021-04-14 | 2022-10-19 | General Electric Company | Turbine à gaz à trois flux avec machine électrique intégrée |
BE1029507B1 (fr) | 2021-06-18 | 2023-01-23 | Gen Electric | Structure de turbomachine a trois flux |
EP4355989A1 (fr) | 2021-06-18 | 2024-04-24 | Safran Aero Boosters | Structure de turbomachine a trois flux |
US12060829B2 (en) | 2022-04-27 | 2024-08-13 | General Electric Company | Heat exchanger capacity for one or more heat exchangers associated with an accessory gearbox of a turbofan engine |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5079916A (en) * | 1982-11-01 | 1992-01-14 | General Electric Company | Counter rotation power turbine |
GB2173863B (en) * | 1985-04-17 | 1989-07-19 | Rolls Royce Plc | A propeller module for an aero gas turbine engine |
US4976102A (en) * | 1988-05-09 | 1990-12-11 | General Electric Company | Unducted, counterrotating gearless front fan engine |
DE3941852A1 (de) * | 1989-12-19 | 1991-06-20 | Mtu Muenchen Gmbh | Propfantriebwerk mit zwei entgegengesetzt drehenden fanrotoren |
GB0702608D0 (en) * | 2007-02-10 | 2007-03-21 | Rolls Royce Plc | Aeroengine |
FR2940247B1 (fr) * | 2008-12-19 | 2011-01-21 | Snecma | Systeme d'helices contrarotatives entrainees par un train epicycloidal offrant une repartition de couple equilibree entre les deux helices |
FR2941492B1 (fr) * | 2009-01-23 | 2011-09-09 | Snecma | Turbomachine a turbine de puissance equipee d'un generateur electronique de puissance centre sur l'axe de la turbomachine |
US8661781B2 (en) * | 2009-02-13 | 2014-03-04 | The Boeing Company | Counter rotating fan design and variable blade row spacing optimization for low environmental impact |
FR2974060B1 (fr) * | 2011-04-15 | 2013-11-22 | Snecma | Dispositif de propulsion a helices contrarotatives et coaxiales non-carenees |
FR2994707B1 (fr) * | 2012-08-21 | 2018-04-06 | Snecma | Turbomachine hybride a helices contrarotatives |
US9835093B2 (en) * | 2013-09-19 | 2017-12-05 | The Boeing Company | Contra-rotating open fan propulsion system |
CA2855442C (fr) * | 2014-06-30 | 2017-12-19 | The Boeing Company | Systeme de propulsion a soufflante ouverte contrarotative |
US20160023773A1 (en) * | 2014-07-23 | 2016-01-28 | Hamilton Sundstrand Corporation | Hybrid electric pulsed-power propulsion system for aircraft |
US10618667B2 (en) * | 2016-10-31 | 2020-04-14 | Rolls-Royce Corporation | Fan module with adjustable pitch blades and power system |
-
2018
- 2018-10-26 FR FR1859925A patent/FR3087849B1/fr active Active
-
2019
- 2019-10-25 CA CA3117485A patent/CA3117485A1/fr active Pending
- 2019-10-25 WO PCT/FR2019/052557 patent/WO2020084271A1/fr unknown
- 2019-10-25 CN CN201980070659.5A patent/CN112930436A/zh active Pending
- 2019-10-25 US US17/288,206 patent/US11987369B2/en active Active
- 2019-10-25 EP EP19813119.5A patent/EP3870827A1/fr active Pending
Also Published As
Publication number | Publication date |
---|---|
CA3117485A1 (fr) | 2020-04-30 |
FR3087849A1 (fr) | 2020-05-01 |
WO2020084271A1 (fr) | 2020-04-30 |
US20210403169A1 (en) | 2021-12-30 |
US11987369B2 (en) | 2024-05-21 |
FR3087849B1 (fr) | 2020-11-20 |
CN112930436A (zh) | 2021-06-08 |
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